MileCheckEverywhere else in this series, the kilometre marker is a precision upgrade — a better way to say where you are on a road that also has exits, towns, and cell service. In the Northwest Territories, drop the qualifiers. Out here there are ten numbered highways, the next community can be hundreds of kilometres away, and cell service disappears for long stretches between them. There is no cross-street, no exit number, no gas station to name. The marker is your location — the whole of it. Here’s how the territory’s system works, and how it’s coming to MileCheck.
Ten highways, a number every two kilometres
The Government of the Northwest Territories posts kilometre markers at a 2-kilometre cadence on all ten of its numbered highways — a denser, more disciplined posting than most provinces manage. That’s not bureaucratic tidiness; it’s the location infrastructure for a road network with almost nothing else to reference. When you report a breakdown, a washout, or a wildlife strike to the RCMP or a tow operator up here, the question is always the same: which highway, and what kilometre? Every 2 km, the road answers it for you.
Highway 1: the Mackenzie
Highway 1, the Mackenzie Highway, is the territory’s front door: it crosses the 60th parallel from Alberta at KM 0 and runs 696 kilometres northwest — past the junctions that feed the entire rest of the network, through Fort Simpson country toward Wrigley. Drive it end to end and you’ll understand the territory’s scale in your hands: long, straight boreal stretches where the km posts are the only thing changing.
Highway 3: the Yellowknife run and the Deh Cho Bridge
Highway 3 leaves Highway 1 near Fort Providence and runs 338 kilometres to Yellowknife, the capital — the busiest corridor in the territory, which up here means you might see another vehicle every few minutes. Early in the run it crosses the Mackenzie River on the Deh Cho Bridge, opened in 2012 — the first year-round crossing of the river, replacing the old summer ferry and winter ice crossing that used to sever Yellowknife from the road network twice a year during freeze-up and breakup. Past the crossing, the highway skirts Behchokǫ̀ and runs the North Slave granite country into the city.
Highway 8: the Dempster, continued
The Dempster Highway starts near Dawson City, Yukon, and runs north across the Arctic Circle — and when it crosses into the NWT, the kilometre count starts over: NWT Highway 8 runs from KM 0 at the Yukon border to KM 272 at Inuvik. So if you’re driving the whole Dempster, expect the posts to reset at the border — the Yukon count and the NWT count are two different ladders. The NWT section also has the Dempster’s famous river crossings: the Peel River near Fort McPherson and the Mackenzie River at Tsiigehtchic, both crossed by ferry in summer and by ice crossing in winter. During freeze-up and breakup — the shoulder weeks when the ice is neither liquid nor road — the crossings shut down and the highway is simply severed. Locals plan around it; you should too.
Highway 10: the road to the Arctic Ocean
The newest number on the map is the best story. Highway 10, the Inuvik–Tuktoyaktuk Highway, opened in November 2017 and runs 138 kilometres from Inuvik to Tuktoyaktuk on the Arctic coast — Canada’s first all-season public road to the Arctic Ocean. Before it opened, Tuk was reachable by road only in winter, over ice. Now you can drive from anywhere in North America to the edge of the Beaufort Sea, and the last 138 kilometres are gravel, treeless, wind-scoured, and posted every 2 km like everything else up here. It closes in bad weather — check conditions before you commit — but it’s open in every season, which is the revolution.
Winter roads are a different thing
One boundary worth drawing clearly: the NWT also operates a network of winter roads — seasonal routes over frozen ground and ice that connect fly-in communities for a few months each year. Those are a different animal: seasonal, unmarked, and outside the scope of this guide. Everything above is about the numbered all-season highways — the roads with km posts. If your plans involve a winter road, that’s specialized travel with its own rules, load limits, and opening dates; treat it as such.
Check conditions, then tell someone
The territory’s road report is the GNWT highway conditions service, run by the Department of Infrastructure — closures, construction, ferry and ice-crossing status, all reported by highway and kilometre. Check it before every leg, not just the first one, because ferry status and weather closures change daily.
And then do the thing that actually keeps people alive up here: tell someone your route and your ETA before you leave. On highways with no cell service for long stretches, your safety margin is what you arranged in advance — a person who knows which highway you’re on and when to worry, a full tank, water, warm gear, and a spare tire you’ve actually checked. If you break down, stay with your vehicle — it’s shelter, and it’s far easier to spot than you are. When you reach help or help reaches you, your location is the same three items as everywhere else in this series, except here they’re the only items: the highway, your direction, and the last km post you passed. “Highway 3 westbound, near KM 240” is a complete address in the Northwest Territories.
What this means in MileCheck
MileCheck’s job is to tell you exactly where you are, in the reference system your road actually uses — and nowhere does that job matter more than here. Northwest Territories support is coming to MileCheck in an upcoming update, covering all ten numbered highways with the GNWT’s own 2-km marker positions. And because the app is built offline-first — the marker data rides on your phone, no signal required — it keeps answering “where am I?” on exactly the stretches where nothing else can. Hwy 3 · KM 240, on your screen, 100 kilometres from the nearest bar of service.
Keep reading
More Canada: Kilometre markers in British Columbia · Alberta · Ontario · Quebec · Nova Scotia · Alaska
Essentials: What to tell 911 on the highway · How to find your mile marker · All provinces & territories